rockchip: rk3568: Add sdram driver
Add the driver for rk3568 u-boot to get sdram capacity.
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/ram/rockchip/sdram_rk3568.c b/drivers/ram/rockchip/sdram_rk3568.c
new file mode 100644
index 0000000..0ac4b54
--- /dev/null
+++ b/drivers/ram/rockchip/sdram_rk3568.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2021 Rockchip Electronics Co., Ltd.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ram.h>
+#include <syscon.h>
+#include <asm/arch-rockchip/clock.h>
+#include <asm/arch-rockchip/grf_rk3568.h>
+#include <asm/arch-rockchip/sdram.h>
+
+struct dram_info {
+ struct ram_info info;
+ struct rk3568_pmugrf *pmugrf;
+};
+
+static int rk3568_dmc_probe(struct udevice *dev)
+{
+ struct dram_info *priv = dev_get_priv(dev);
+
+ priv->pmugrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUGRF);
+ priv->info.base = CONFIG_SYS_SDRAM_BASE;
+ priv->info.size =
+ rockchip_sdram_size((phys_addr_t)&priv->pmugrf->pmu_os_reg2);
+
+ return 0;
+}
+
+static int rk3568_dmc_get_info(struct udevice *dev, struct ram_info *info)
+{
+ struct dram_info *priv = dev_get_priv(dev);
+
+ *info = priv->info;
+
+ return 0;
+}
+
+static struct ram_ops rk3568_dmc_ops = {
+ .get_info = rk3568_dmc_get_info,
+};
+
+static const struct udevice_id rk3568_dmc_ids[] = {
+ { .compatible = "rockchip,rk3568-dmc" },
+ { }
+};
+
+U_BOOT_DRIVER(dmc_rk3568) = {
+ .name = "rockchip_rk3568_dmc",
+ .id = UCLASS_RAM,
+ .of_match = rk3568_dmc_ids,
+ .ops = &rk3568_dmc_ops,
+ .probe = rk3568_dmc_probe,
+ .priv_auto = sizeof(struct dram_info),
+};